Pokemon Mystery Dungeon Red Rescue Team is the only Mystery Dungeon game that ever made it on the GBA series, while the other were put in the DS series. Although I wish Blue Rescue Team made it on the GBA series too so we could play it here. Besides the point this game is a mixture of RPG, strategy, and dungeon crawler (which is still new to me, even though I played the DS versions). The game has many new elements in it as opposed to the other Pokemon game.
Story: I won't get too much into the story for I don't want to give any spoilers, but it is basically you are turned into a Pokemon (which one you turn into depends on how you answer the personality quiz) and you and you're partner Pokemon (you get to choose which one) try to find out how you got turned into a Pokemon. That is all I'm saying for the story.
Turn System: The mystery Dungeon games have a different turn system from other Pokemon games: You go first, next is your partner Pokemon, then allies, finally enemy Pokemon. So the turn system is a definition of think before you act.
Sound: The sound is a lot smoother as opposed to other Pokemon games so the music on this site won't bother you much.
Addictiveness: The game is very addictive and is fun to play for those who like Pokemon, RPG, strategy, or dungeon crawlers.
The game is some what challenging if you are not prepared especially as the game progresses. Here is a little info I got from chats, you can only evolve after you finish the main story which is rather annoying.
Another thing is that in order to recruit members on your team is to defeat them an get them out of the dungeon with out them fainting. Pokemon will only join you if you have the Friend Area (which Wigglytuff sells) they inhabit, so be sure to have money to buy a lot if you want a lot of members on your team.
The dungeons in the game have specific size limits on how many people you can have on your team which is another annoying thing about the game but allows you to have space to recruit new members.
Items: Tools you use in the game most are based of the previous Pokemon games (Oran berries, Pecha Berries), other are original (Reviver Seeds,Power Bands.
So this game series has many element that set it apart from most Pokemon games and I think fans will love playing this game despite it's few flaws.

I've always been a big fan of this game. For a Pokemon game, an emotionally driven story is rare, and this game pulls it off well. I love the personality quiz, despite it being quite easy to manipulate to get the Pokemon you want.

Cubone FTW.

Great game really loved the way it played and the graphics weren't too bad at all, not a bad play at all, everyone should give it one try at some point, it least once, great game overall, just not a 5 out of 5 though.

Lol what!? I had no idea there was even a single Pokémon Mystery Dungeon game that made it onto the GBA! This is really cool! I might actually give this one a try, thank you for drawing my attention to it

i didnt personally get into this game. Yes its different, but i didnt think it fit in with the other pokemon games.